Printer&#39;s hook.



wmssgEs 3 F. G. LEETHEM.

PBINTERS HOOK. APPLICATION FILED man 5, 1900."

920,354. PatenteqMay'4,1909.

T511 1 Tia- INVENTOH W Jk-anfi'CZeeZ/zem l lllilllal 32f ATTORNEYS UNITED STATESWPATENT OFFICE.

' FRANK O. LE ITHEM, OF MIDDLETOWN, NEW YORK.

PRINTERS HOOK.

To all whom it may concern:

Be it known that I, FRANK O. LEETHEM, a

. citizen of the United States, and a resident such as used by printers for retaining printingrplates in press beds and printing forms. e .object of the invention is o produce an adjustable printing hook wlnch can be adjusted by an ordinary pin wrench, or by other interchangeable means. From this arrangement a printer urchasing the hooks may select the particu ar means desired for adjusting the hooks, but if at any time he desires to adjust the hooks in a different manner, or by different means, this may be done.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanyingdrawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan showing a portion of a press bed and a portion of=a plate thereupon,

and illustrating the manner 1n which the adjusting hook operates to secure the plate; Fig. 2 is a plan of a block and hook, and illustrating the manner in which the hook is adjustably mounted in the block; Fig. 3 is a vertical cross section through the block, and showing the adjustin hook and the head of the adjusting screw; ig. 4 is an elevation of the face of a drive slug wh'ch goes into the block behind the hook an which engages the head of the screw for adjusting the same; Fig. 5 is a vertical section through the drive slug shown in Fig. 4; Fig. '6 is an elevation showing upon an enlarged scale, a second form of drive slugwhich mav be used to adjust the hook; Flg. 7 ,is a plan of the drive slug shown in Fig. 6; Fig. Sis an elevation of the wrench which is used to operate the drive slug; and Fig. 9 is a side elevation of a bow which is used for adiustihgthe screw l when used with the drive slug shown in F1 s. 2, 4 and 5.

eferring more particularly to the parts, 1 re resents a portion of a printing late whic is laid upon a press bed, and the ody of which is composed of blocks 2. Certain of these blocks, such as a block 3, are special Specification of Letters Patent.

Application filed June 6, 1908.

Patented May 4, 1909.

Serial No. 436,863.

blocks formed each with a channel 4 passing completely throu h the block to its opposite side. faces. The lock is of square form, as shown. The form of the channel 4 is indicated most clearly in Fig. 3. It is formed with under-cut grooves 5 at its sides. In the channel there is mounted a sliding hook 6 which is formed at its side edges with tongues 7 which are received in the grooves 5, as in dicated'in Fig. 3. The body of this hook 6 has the form of a block, the up er face of which is flush with the upper 'ace of the block 3. The hook S proper projects above the face ofthe block so as to engage the edge ofthe printim plate, as will be readily understood. This hook 8 is threaded so as to receive an ad'usting screw 9 which passes completely through the same, as shown in Fig. 2. This screw has a slightly rounded head 10, which is rovided wlth cuts 11 at right angles to eaci other. \Vhen it is desired to adjust the hook 6 by an ordinary pin wrench, I place a plain slug 12 behind the head of the screw, as indicated in Fig. 1, and a similar plain slu 13 at the forward end of the screw. The biock is out to the pica system and measures eight ems at its ed es. The slugs 12 and 13 are also cut to even pleas in thickness, and the length of the screw is such that when the slugs are laced in osition, the length of the channe will be led. The adjusting screw 9 may then be adjusted by inserting the end'of the pin Wrench in the ends of the cuts 11 so as to rotate the screw, as will be readily understood.

Instead of using the lain slug 12, I employ when desired, a drive slu 14, as illustrated in Fi s. 2, 4, and 5. This slug has a body '15 with side tongues 16 which are received in the grooves 5, as will be'understood. On the faceof the body 15 which comes adj acent to the head of the screw, I provide a gear wheel or pinion 17, and this inion is rotat'ably mounted in the slug. ts outer face is rovided with diametrically oppositely disposed radial ribs 18 which are ada ted to engage in the cuts 11 of the screw heac. The upper face of the body 15 is formed with a shallow dished recess 19, at the side of the upper edge of the gear-wheel 17. As indicated, the gear wheel n'ojects slightly above the upper face of t 1e slug. The gear wheel is received in a shallow ocket or recess .20 which is formed on the ace of the slu as shown. The over-all dimension of the s ug 14 is the same as the width of the plain slu 12, that is, when this slug is sub-. stituted or the former, the partswithin the channel completely fill its length, .as will be readily understood. hen a slug issub stituted in this manner, the ribs or tongues 18 are brought into the cuts 11 so that when the gear wheel is rotated, the screw also will.

be rotated. V

In order to rotate the gear wheel, I provide a bow 21, the constructionof which is very clearly shown in Fig. 9. The body of this how is of arcuate form, with side plates 7 or fends 22 between which transverse teeth bow is then drawn laterally with respect to the screw, and slightly rotated, so that it maintains an engagement with the gear wheel. In this way the screw may be rotated in either direction so as to lock up or unlock the plate, with which the hook 8 may engage. Instead of using this form of drive slug, I may use the form of drive slugshown in Figs. 6 and 7. In this case the body 25 of the slug is provided with a countersunk wheel 26 on the face which comes ad'acent to the screw, and this wheel is forme' with radial ribs 27 which engage the cuts in the screw head, as will be readily understood. Rigid with the wheel 26, I provide a worm wheel 28 mounted within the slug, and this worm wheel meshes with a worm 29 mounted in the slug. The upper end of this worm 29 is formed into a square socket 230 which. is adapted to be rotated by means of a wrench or pin 31, shown in Fig. 8. This in has a square tip 32, which is received in t e socket, as will be readily understood. The body 25 of this drive slug is provided with side tongues 33 which are received in the grooves In this way, by providing different kinds of backing slugs behind the adjusting screws, the hook may be adjusted by different means.

Special attention is called to the means for interlocking the wheel of the drive slug with the head of the screw. 7

Having thus described my invention, -I claim as new and desire to secljare by Letters Patent,

1. A printers block having a guide channel therein, a hook sliding in said channel and having an adjusting screw with ahead adapted to he rotated by a pin wrench, and a drive slug adapted to be received in said channel, and having a rotatable member interlocking with said screw to rotate thesame. I I

2. A printers blocknhaving -a' channel formed therein, a hook sliding in saidchannel and having an adjusting screw disposed longitudinally within the said channel, the.

said adjusting screw havingcuts in the head thereof adapting said'screw to be adjusted by a pin wrench, a drive slug received in saidchannel behind 'said screw, and a wheel on the face of said slug having ribs engaging said cuts.

3. A rinte rs block having a channel formed t erein, ahook sliding 1n said channel and having an adjustingscrew disposed longitudinally withinthe said channe the said adjusting screw having cuts in the head having'an adjusting screw disposed longitudinally of said channel, said adjusting screw having cutsin the head thereof, a

drive slug received in said channel adj aeent to the headof said screw, a gear wheel rotatably' mounted on the face of said slug adjacent to said screw and having ribs en gaging said cuts to rotate said'screw, said gear wheel being arran ed to project at its upper edge above saids u Y i 5. A printers block having a channel therein, a hook sliding in'said channel, an

adjusting screw adapted to advance said 7 hook and'having cuts in the head thereof, a, removable drive slug adapted to be placed -in said block, havinga gear. wheel on the face thereof adjacent to said screw, said gear wheel having ribs engaging said cuts, the upper faces of said slug aving a. depression ad acent to said gear wheel.

6. A printers block having a guide channel therein, a hook sliding in said channel and having an adjustin screw with a head adapted to be rotated y a pin wrench, 'a slug received in said channel engagingthe head of said screw andhaving its outer face flush with the side face of said block at one end of said channel, and a second slu dis- 1rliosed in the other end of said channel and aving its face flush with the side face of said block at the other end of said channel. 1

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK C. LEETHEM. Witnesses:

F. D. AMMEN, JOHN P. .Dnvrs. 

